See 'WikiDevi' @ the Internet Archive (MW XML, Files, Images)
upgraded MW to 1.30 - maybe things are slightly less broken
Realtek.For a list of all currently documented Realtek chipsets with specifications, see
300Mbps Wireless Mini USB Adapter
"1244-00000755-50Z_ES" is silkscreened on the board in the FCC photos.
The same PCB is used for a few different models: